These polls were all released on Thursday. Colorado is shaded red because every other poll in the state this year has had Obama in the lead. The Romney surge continues.

Both of the two positive states — Virginia and Wisconsin — saw dips for Obama from previous polling. In a March Quinnipiac survey of Virginia, Obama held an 8-point lead. The Wisconsin results, on the other hand, reaffirm that it's going to be a close race there.

The Obama campaign doesn't have Michigan on its official list of swing states. But if Romney flipped Michigan, Colorado, Ohio and Florida this election, that would give him the razor-thin 278 to 260 electoral victory.